Corrosion affects Data Center’s reliability . . .
. . . Monitor Corrosion at your Data Center Smartly!
A combination of humidity, temperature, and various gaseous contaminations can result in corrosion which in turn leads to downtime in Data Centers. Installation and maintenance of effective monitoring devices ensures early detection of corrosion and thus prevents downtime.
Whether it’s ‘Mashaks’ or sacks and bottles of 3000 B.C. or modern-day upholstery, leather goods have always been and will remain a wise investment that lasts a lifetime. But, what does it take to maintain the quality of leather? It’s dehumidification. Yes, modern-day technology can evade moisture accumulation during packaging and storage of leather goods.
Typically there are two types of measurement methods as below:
Corrosion Classification Coupon (CCC):
It provides a direct, quantitative measurement of the overall corrosion potential of an environment. These coupons have two pure metal strips and are placed at strategic locations in the operating environment for a period of 30 days. After 30 days, the coupons are analysed in a laboratory. The thickness of the layer of corrosion which forms on the metal strips determines the severity level as per ISA 71.04-2013 standard. While following manufacturing procedures, it is recommended to maintain the relative humidity at 15% (+/-5%) and temperature at 20°C (+/-2°C).
Real time atmospheric corrosion monitor:
These instruments help to access severity level on real time basis. The measurements are extrapolated in 24 hours for 30 days to know the severity level as per ISA standard. It also measures room temperature, relative humidity and optionally, the differential pressure to give the complete parameters.
Real time atmospheric corrosion monitors can be further classified in two technologies:
- One is based on Quartz Crystal Microbalance (QCM), which measures the rate of increase of corroded metal sensors mass.
- The other determines the rate of electrical resistance increase of corroded metal strips.
Corrosivity Levels of Environment as per ISA 71.04 – 2013 Standard
|
Class
|
Severity
Level
|
Cu/Ag
Reactivity
Rate/Month
|
Comments
|
|
G1
|
Mild
|
<300Å=Cu
<200Å=Ag
|
An environment sufficiently well-controlled such that corrosion is not a factor in determining equipment reliability.
|
|
G2
|
Moderate
|
<1000Å
|
An environment in which the effects of corrosion are measurable and corrosion may be a factor in
determining equipment reliability
|
|
G3
|
Harsh
|
<2000Å
|
An environment in which only specially designed and packaged equipment would be expected to survive.
Specifications for equipment in this class are a matter of negotiation between user and supplier.
|
|
GX
|
Severe
|
>2000Å
|
An environment in which there is a high probability that corrosive attack will occur. These harsh levels should
prompt further evaluation resulting in environmental controls or specially designed and packaged equipment.
|
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